13148221 has 2 divisors, whose sum is σ = 13148222. Its totient is φ = 13148220.

The previous prime is 13148189. The next prime is 13148231. The reversal of 13148221 is 12284131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13039321 + 108900 = 3611^2 + 330^2 .

It is an emirp because it is prime and its reverse (12284131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13148221 - 2⁵ = 13148189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13148192 and 13148201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13148231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6574110 + 6574111.

It is an arithmetic number, because the mean of its divisors is an integer number (6574111).

Almost surely, 2^13148221 is an apocalyptic number.

It is an amenable number.

13148221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13148221 is an equidigital number, since it uses as much as digits as its factorization.

13148221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 22.

The square root of 13148221 is about 3626.0475727712. The cubic root of 13148221 is about 236.0237276249.

The spelling of 13148221 in words is "thirteen million, one hundred forty-eight thousand, two hundred twenty-one".